[manpages.org](https://www.google.ru/search?q=00000+site%3Ahttps%3A%2F%2Fmanpages.org)
[pubs.opengroup.org](https://www.google.com/search?q=00000+https%3A%2F%2Fpubs.opengroup.org)
[www.opennet.ru](http://www.opennet.ru/man.shtml?category=2&topic=00000)
[man7.org](https://www.google.ru/search?q=00000+site%3Ahttps%3A%2F%2Fman7.org%2Flinux%2Fman-pages)
[en.cppreference.com](https://www.google.com/search?q=00000+en.cppreference.com)
[www.mankier.com](https://www.mankier.com/?q=00000)

books
[cpp.com.ru](https://yandex.ru/search/?text=00000+site%3Ahttps%3A%2F%2Fcpp.com.ru)
[linuxhint.com](https://www.google.ru/search?q=00000+site%3Ahttps%3A%2F%2Flinuxhint.com)
[gnu.org](https://www.google.ru/search?q=00000+site%3Ahttps%3A%2F%2Fwww.gnu.org%2Fsoftware%2Flibc%2Fmanual)

examples
[cpp.hotexamples.com](https://cpp.hotexamples.com/examples/-/-/00000/cpp-00000-function-examples.html)

classic
[bogatyrev_c_unix](https://www.google.com/search?q=00000+site%3Ahttps%3A%2F%2Fcpp.com.ru%2Fbogatyrev_c_unix)
[kr_cbook](https://www.google.com/search?q=00000+site%3Ahttps%3A%2F%2Fcpp.com.ru%2Fkr_cbook)

eners
[pubs.opengroup.org](https://pubs.opengroup.org/onlinepubs/9699919799/idx/head.html)

issue code
[code.woboq.org](https://www.google.com/search?h=&sitesearch=https%3A%2F%2Fcode.woboq.org%2Fuserspace%2Fglibc%2F&q=00000)